Céline Viguier joined the Siracusa Institute in November 2024 as Deputy Director General. She is a French magistrate seconded to Expertise France as a foreign expert. She began her career in 2008 as a Deputy Prosecutor (substitut du procureur) and joined in January 2016 the Directorate of Criminal Affairs and Pardons of the French Ministry of Justice. She was the Deputy head of the office fighting against organized crime, counterterrorism and money laundering and, in July 2019, she was appointed as Senior Prosecutor (vice-procureure) in the National counterterrorism prosecution office in Paris, particulary in the specialized unit for crimes against humanity and war crimes. She holds a Master in Criminal law from the University Paris II Panthéon Assas.